Rapid-acting vise.



No. 703,765. Patented July l, |902.

H D CHIPMAN RAPID ACTING VISE.

Ied Mar. 8, 1902.)

(Application (No Model.)

Y nuts.

Prion.

HORACE D. CHIPMAN, OF CINCINNATI, OHIO.

RAPID-ACTING VISE.

y .VYSPCIFICATION forming part of Letters PatentNo. 703,765, dated July .1, 1902.

`Application nea March s, 1902.

To all whom it may concern:

Be it known that l, HORACE D. CHIPMAN, a citizen of the United States, residing at Cincinnati,'in the'county of Hamilton andState of Ohio,'ha've invented'certain new and useful Improvementsin Rapid-ActingVises, of which the following is a specification.

lMy 'invention relates to a rapidly-operating vise. f

Theobject of' my invention is to produce a vise in which the jaws can be rapidly set at any desired distance apart by first a partial rotary backward movement of the screw-rod, which releasesthe engagement of the nut, and in that position-the jaw, which is secured to the screw-ro`d,may"be readily moved longitudinally in either direction'.V 1

Another object of my invention is the con'-` struction of the parts in a simple manner, requiring very littlemachine-work, and so that they can be cheaply made and yet strong and serviceable.v y

Another objectlof my'invention is to produce a vise in which` the'screw-rod can be released from engagement with power-nut, still permitting thesorew-rod to be continuously revolved in either direction at will.

The various features of my invention will be more fully set forth in the description of the accompanying drawings, forming a part of this specification, in which- Figure lis a side elevation of vmy improved vise. Fig. 2 is an enlarged sectional TelevationV on lineart, Fig. l. Fig.'3 is-a central longitudinal section ofFig. l. Fig. 4c is` an enlarged end elevation of nut-yoke frame and sector. Fig. is an enlarged perspective view of sector-lifting cam and its sleeve. Fig. 6 is aperspective view of nut-yoke frame. Fig. 7 isa section on line o fu, Figk. Fig. 8 is a perspective view of one of the hinge half- Fig. 9 is a perspective view o f the cam feather-key. y

A represents the shell frame of the vise, the opening servingv as ai guideway' for -the -sliding jaw-arm. A' represents the base; A?, the fixed jaw formed integral with the frame.

B represents a hollow jaw-arm sliding longitudinally inthe hollow frame A. C represents the movable jaw formed integral therewith.

D represents an inside frame supported serial No. 97,216. (No man.)

` Iupon the base A and.V rigidly secure d thereto.

The sides et of the shell frame B extend lat- :erally each side of the frame D, so that the jaw C and the extended arm B have a firm bearingsupport to maintain the parallelism of the jaw.

Upon the frame D is mounted the operating mechanism for'engaging and releasing the operation of the nut with which the screw-rod E engages to apply power to the movable clam ping-jaw. These operative parts are so constructed and combined that the screw-rod and its nut are always in engagement when the screw-rod is turned forward and provided with devices whereby the engagement of the nut is automatically released during a portion of the backward revolution of the screw rod, and during this period the jaw-arm is free to be slid in'either direction. This operation is secured by the following devices: F F represent half-nuts, each of which is the counterpart of the other. They are pivoted by centers e to the bracket h of the frame D, as shown in Fig. 3. These half-nuts in their normal position are closed, so as to engage with the threads of the screw-rod E, and they are in this position whenever the screw-rod is turned by a forward movement of the screwrod. In order that these nuts may be disengaged by being opened outward, as shown in dotted lines, Fig.`2, by a backward turn of the screw-rod and held in normal engagement 'with the threads of the screw-rod by a forward turn, I provide thefollowing devices: Grepresents a nut-yoke frame having two limbs f, projected downward and normally resting on the base of frame D. When in this position, the longitudinal arms CZ d'engage with the inclined shoulders c of the half-nuts F F and hold the nut-limbs in engagement with the Screw-rod. In order that the nut-limbs may be swung outward to disengage the threads ofthe screw-rod, I providethe following mechanism for lifting the nut-yoke frame Gr and having it engage-:with the tripping-ears g on the half-nuts: f 7i represents the catches on the limbs which engage withthe tripping-ears g when the yoke-frame is lifted, thereby causing the nut-limbs to oscillate on their centers c and move outward far enough to be entirely free from the threads of the screw-rod and to occupy the position shown in dotted line, Fig.

IOO

2. This nut-yoke frame is adapted to be lifted only by the backward turn of the screwrod and during only a part of its revolution, but holds the nut-limbs in engaging position always during the forward turn of the screwrod. This result is obtained by the following instrumentalities: I-I represents a camdisk. Upon the face of it is provided two cam members I I. .I represents a journal boss or sleeve rigidly secured to the cam. This disk journals in the hub K of the frame D, projecting upward from the base of the frame D, as shown in Fig. 3. The sleeve J is provided with a half-slot L, as shown in Fig. 5. Screw-rod E is splined its entire length. M represents a feather-key provided with an oblong base or limb resting in the spline` of the screw-rod. N represents the key portion projecting through the slot L of the cam-sleeve J. This key revolves with the screw-rod and causes the rotation of the cam when the screwrod is turned forward by the engagement of key N with the sides Z Z of the slot. Upon the nut-yoke frame G and on its rear face is pivoted a gravity-sector O. As the screwrod E is turned forward this sector is pushed to one side, as shown in dotted lines, Fig. 4, and drops back by gravity as soon as the cams I I', respectively, pass the same. In order to prevent the sector from being thrown too far, the rear face of the nut-yoke frame G is provided with a segmental slot n, and the sector with a pin m engages the said slot and limits its movement in each direction. Now when the cam is reversed by turning the screw-rod backward one of the cams I I comes in engagement with the face of said sector O when it is in the position opposite that shown in Fig. 4L. The engagement of the cam with the sector and its pin o?, lifts the nut-yoke frame upward, and during the last portion of its upward movement the framearms d engage the ears of the half-nuts and swing them outward far enough to release the thread engagement. When in this position, the jaw C and its shell-arm may be freely moved in or out.

`In order that the nut-release may be maintained for some little time, so that the screwrod will not have to be turned back to an eX- act position, the cams and sector are constructed as follows: The ends of the cams are arcs of a circle. The end of the sector O is the arc of a circle. The lengths of the cams and sector are so proportioned thatwhen the sector has reached the end of its upward movement in lifting the yoke-frame G the periphery of the lifting-camwill engage with the periphery of the sector, and the cam will travel past the sector and hold it up during the time of its engagement. As soon as the cam has traveled past the sector it will drop into position to be again lifted by the next cam. Thus the screwrod may be turned backward continuously, if desired. There is no locking of the parts during the backward turn of the screw-rod, and hence no strain incident thereto,the vise-j aw being free to be slid laterally during any period of the cam-andsector contact.

The screw-rod Eis secured to the movable jaw C by a gib s. Pressure to pull or push the screw-rod causes the jaw and screw-rod to slide freely in and out of the stationary vise-frame, thereby adjusting the relative position of the vise-jaws to any desired distance apart. The instant the screw-rod is turned to the forward position the engagement of the cam and sector is released. The weight of the nut-yoke frame G causes it to descend, and in its descent engages the inclines c of the half-nuts, forcing them togetherand causing their threads to quicklyA engage with the threads of the screw-rod.

lWlode of operation: Q represents the usual handle journaled in the stem of the screw-rod, as in ordinary vises. Suppose the parts to be in their normal position, with the threads of the half-nuts engaging with the screw-rod. A forward turn of the screw-rod draws the jaw C inward toward the clamping position.` If now it be desired to move the jaw C longitudinally, the screw-rod is turned i-n the reverse direction. When the lug N of the feather-key has turned backward far enough to engage with the face Z of the slotted sleeve J, the camsI I would be rotated backward, engaging the edge of the sector, forcing it to raise the nut-yoke frame G and swing the half-nuts outward, freeing them from the screw-rod, permitting the screw-rod and the jaw C to be freely moved longitudinally for adjusting of the relative position of the jaws. A partial turn of the lever Q will bring the half-nuts into engagement for moving the jaw C by screw-power. I extend thel slot L in the sleeve J approximately a half-revolution, so that a backward turn of the screwrod will allow the front jaw to recede a sufficient distance to release the clamping pressure before the nut is free, thereby allowing the work to be released from the jaws before the power-nut is set free. The side of the elongated slot gives a sufficient movement of the sector to allow the cams to pass freely.

I use two cams, so that the backward turn of the screw-rod will not be so great to release the half-nuts as would be required with only one cam.

It will be observed that the parts are so constructed that very little machine-work is IIO required to t the parts of the vise together, i

free the nut engagement by the backward turn of the screw-rod, substantially as specified.

2. In a vise employing a stationary jaw, a slidingY jaw supported in the vise-frame, a power-nut composed of segmental half-nuts pivoted to the frame of the vise, in combination with a nut-frame having limbs normally engaging the half-nuts and locking them' in position, and swinging said half-nuts by the lifting of the nut-frame, substantially as specified.

3. In combination with' the screw-rod of a vise secured to a movable jaw and half-nuts pivotally attached to the vise-frame, a nutframe adapted to engage the half-nuts and hold them in the closed or open position, a lifting mechanism composed of a sector pivoted to the nut-frame, a cam having akey feathered engagement withlthe screw-rod, the

i sector and cam being so disposed that the sector will be swung laterally by the cam engagement during the forward revolution vof the screw-rod and will engage and lift the sector during a part of the backward revolution of said screw-rod, substantially as specified.

4. In a vise, a nutreleasing mechanism composed of a cam having a slotted sleeve en-V compassing a screw-rod, a sector pivoted to a nut-releasing frame, a feather-keyadapted to vconnect the screw-rod with the cam-sleeve,

the parts being so disposed thatthe sector will swing idly during the forward turn of the screwrod and come into shipping engagement with the cam by the backward turn of the screw-rod, substantiallyl as specied.

5. In a vise employing a lifting-sector, a cam for operating the same provided with means for periodical engagement'withaV screw-rod, the said sector being pivoted in the path of the traveling cam, the peripheries of said sector and cam being arcs of a circle adapted to engage each other, substantially as herein specified.

6. In a vise, the combination of a fixed and a sliding jaw, an operating-screw,- a housing within the sliding jaw containing two halfnuts pivoted from above so as to normally fall together by gravity upon the contained `5o operating-screw, a vertically-movable frame engaging the opposite sides of the -halfnuts exteriorly, said frame being normally seated vby gravity, to clamp said half-nuts on the screw, and when lifted to separate said halfnuts therefrom,a cam-sleeve on said screw adapted to turnv therewith, and connections between said sleeve and frame adapted to be actuated `bythe reverse rotation of the screw to lift said frame, whereby the slidingjaw 6o may be adjusted'without the screw, substantially as specified.,kv

7. In a vise the combination of apiixed and sliding jaw, an operating-screw, a housing in the sliding jaw containing movable half-nuts for engaging the screw, a sliding frame straddling the half-nuts adapted to clamp the nuts to the screw and release the nuts therefrom, a cam-sleeve on the screw, tripping devices between said frame and cam-sleeve whereby ating-screw may be given a part rotation within said cam-sleeve before the cam-sleeve is caused to rotate therewith, substantially as specified.

8. In a vise, a screw-rod, a cam-sleeve on the screw-rod, a key on the said screw-rod, a 8o peripheral slotted keyway in the said sleeve allowing the said screw-rod when its direction of rotation is reversed to travel a part of one revolution independent of said sleeve, and

half-nuts adapted to engage said screw-rod and to be actuated by the said cam, substantially as described. p

In testimony whereof 'I have hereunto set my hand.

'HORACE D. cI-nrMAN.

IVitnesses:

OLIVER B. KAISER, IDA J. LUCAS. 

